Boundries
(boundry 的复数) n. 边界；境界
🗣️ 情景例句
I don't know haw that could have happened.
我不知道怎么会发生那样的事。
They imagine, what he is doing.
她们在猜他所做的事。
easily obtainable from the lunar rocks in the form of liquid oxygen.
从月球上的岩石中很容易提炼出液态氧，